dotConnect for Dynamics 365 Documentation
Devart.Common Namespace / DbCommandBase Class / ExecuteScalar Method
Example

ExecuteScalar Method
Executes the query, and returns the first column of the first row in the result set returned by the query. Extra columns or rows are ignored.
Syntax
'Declaration
 
Public Overrides Function ExecuteScalar() As Object
 

Return Value

The first column of the first row in the result set.
Remarks
Use the ExecuteScalar method to retrieve a single value (for example, an aggregate value) from a data source. This requires less code than using the System.Data.Common.DbCommand.ExecuteReader method, and then performing the operations necessary to generate the single value from the data returned by a DbDataReaderBase.
Example
This example shows typical usage of ExecuteScalar method
using(DynamicsConnection conn = new DynamicsConnection(connectionString)) {
  conn.Open();
  DynamicsCommand cmd = conn.CreateCommand();
  cmd.CommandText = "SELECT count(*) as NumberOfRegions FROM regions";
  Int64 count = Convert.ToInt64(cmd.ExecuteScalar()); 
}
Dim conn As New DynamicsConnection(connectionString)
conn.Open()
Dim cmd As DynamicsCommand = conn.CreateCommand()
cmd.CommandText = "SELECT count(*) as NumberOfRegions FROM regions"
Dim count As Int64 = Convert.ToInt64(cmd.ExecuteScalar()); 
conn.Close()
Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also